Determination of Cobalt in Soil by Microwave Digestion-Inductively Coupled Plasma-Atomic Emission Spectrometry

[Objective] To establish a method for the determination of cobalt in soil by microwave digestion-inductively coupled plasma-atomic emission spectrometry.[Method]The sample was decomposed by aqua regia-hydrogen peroxide,and pretreated by microwave oven with the optimized digestion parameters.[Result] The detection limit was 0.5 mg/kg,the relative standard deviation was less than 9% and the recovery was in the range of 86.7%-107.9%.[Conclusion] The method provides the advantages of simple operation,high efficiency and accuracy,and it is suitable for the determination of cobalt in soil samples.